import java.util.HashSet;


public class Multime {
	
	private HashSet a = new HashSet();
	
	public void adauga(int elem) 
	{
		a.add(elem);
	}
	
	public void sterge(int elem) 
	{
		a.remove(elem);
	}
	public int nrElem()
	{
		return a.size();
		
	}
	public void afis()
	{
		System.out.print(a);
	}
	
	public void reuniune(Multime m)
	{
		//a.addAll(m);
	}
	
	
}
